CLI and MCP server to control Superhuman email client via Chrome DevTools Protocol (CDP).
- Bun runtime
- Superhuman.app running with remote debugging enabled
# Install dependencies
bun install
# Start Superhuman with CDP enabled
/Applications/Superhuman.app/Contents/MacOS/Superhuman --remote-debugging-port=9333# Check connection status
superhuman status
# Account management
superhuman account auth
superhuman account list
superhuman account switch 2
superhuman account switch user@example.com# List recent inbox emails
superhuman inbox
superhuman inbox --limit 20 --json
# Search emails
superhuman search "from:john subject:meeting"
superhuman search "project update" --limit 20
superhuman search "from:anthropic" --include-done # Search all including archived
# Read a specific thread (requires --account)
superhuman read <thread-id> --account user@gmail.com
superhuman read <thread-id> --account user@gmail.com --context 3 # Full body for last 3 only
superhuman read <thread-id> --account user@gmail.com --jsonUse Superhuman's AI to search emails, answer questions, or ask about specific threads:
# Search emails with natural language
superhuman ai "find emails about the Stanford cover letter"
superhuman ai "what did John say about the deadline?"
# Compose with AI
superhuman ai "Write an email inviting the team to a planning meeting"
# Ask about a specific thread
superhuman ai <thread-id> "summarize this thread"
superhuman ai <thread-id> "what are the action items?"
superhuman ai <thread-id> "draft a professional reply"The AI automatically determines whether to search, compose, or answer based on your prompt.
# Search contacts by name
superhuman contact search "john"
superhuman contact search "john" --limit 5 --json
# Search contacts in a specific account (without switching UI)
superhuman contact search "john" --account user@gmail.comThe --account flag allows operations on any linked account without switching the Superhuman UI:
# Search contacts in a specific account
superhuman contact search "john" --account user@gmail.com
# Works with both Gmail and Microsoft/Outlook accounts
superhuman contact search "john" --account user@company.comHow it works: The CLI extracts OAuth tokens directly from Superhuman and makes API calls to Gmail or Microsoft Graph. Tokens are cached to disk with automatic background refresh when expiring.
# Extract and cache tokens from Superhuman (required once)
superhuman account auth
# Tokens are automatically refreshed when expiring
# If refresh fails, you'll see: "Token for user@email.com expired. Run 'superhuman account auth' to re-authenticate."Tokens are stored in ~/.config/superhuman-cli/tokens.json and automatically refreshed using OAuth refresh tokens when they expire (within 5 minutes of expiry). No CDP connection is needed for token refresh.
Recipients can be specified as email addresses or contact names. Names are automatically resolved to email addresses via contact search.
# Create a draft (using email or name)
superhuman draft create --to user@example.com --subject "Hello" --body "Hi there!"
superhuman draft create --to "john" --subject "Hello" --body "Hi there!"
# List drafts (shows both provider and native Superhuman drafts)
superhuman draft list
superhuman draft list --account user@example.com
# Open compose window (keeps it open for editing)
superhuman compose --to user@example.com --subject "Meeting"
superhuman compose --to "john" --cc "jane" --subject "Meeting"
# Send an email
superhuman send --to user@example.com --subject "Quick note" --body "FYI"
# Reply to a thread
superhuman reply <thread-id> --body "Thanks!"
superhuman reply <thread-id> --body "Thanks!" --send
# Reply-all
superhuman reply-all <thread-id> --body "Thanks everyone!"
# Forward
superhuman forward <thread-id> --to colleague@example.com --body "FYI"
# Update a draft
superhuman draft update <draft-id> --body "Updated content"
# Delete drafts
superhuman draft delete <draft-id>
superhuman draft delete <draft-id1> <draft-id2>
# Send a draft by ID
superhuman send --draft <draft-id>
# Send a Superhuman draft with content
superhuman draft send <draft-id> --account=user@example.com --to=recipient@example.com --subject="Subject" --body="Body"The draft list command shows drafts from multiple sources with a "Source" column:
| Source | Description | Example ID |
|---|---|---|
native |
Superhuman-only drafts | draft00ce4679cc58a64c |
gmail |
Synced to Gmail | Gmail message ID |
outlook |
Synced to Outlook | Outlook message ID |
Native Superhuman drafts (IDs starting with draft00...) are fetched from Superhuman's backend API and only exist in Superhuman. Provider-synced drafts are fetched from Gmail/Outlook APIs and are visible in native email clients.
Drafts created via draft create use native Gmail/Outlook APIs, not Superhuman's proprietary draft system. This means:
| Where | Visible? |
|---|---|
| Native Gmail/Outlook web | Yes |
| Native mobile apps | Yes |
| Superhuman UI | No |
This is acceptable for CLI workflows where you iterate on drafts with LLMs and send via --send flag. If you need to edit in Superhuman UI, open the draft in native Gmail/Outlook first.
# Archive
superhuman archive <thread-id>
superhuman archive <thread-id1> <thread-id2>
# Delete (trash)
superhuman delete <thread-id>
# Mark as read/unread
superhuman mark read <thread-id>
superhuman mark unread <thread-id>
# Star / Unstar
superhuman star add <thread-id>
superhuman star remove <thread-id>
superhuman star list
# Snooze / Unsnooze
superhuman snooze set <thread-id> --until tomorrow
superhuman snooze set <thread-id> --until next-week
superhuman snooze set <thread-id> --until "2024-02-15T14:00:00Z"
superhuman snooze cancel <thread-id>
superhuman snooze listReusable email templates stored in Superhuman. Snippets support template variables like {first_name}.
# List all snippets
superhuman snippet list
superhuman snippet list --json
# Use a snippet to create a draft (fuzzy name matching)
superhuman snippet use "zoom link" --to user@example.com
# Substitute template variables
superhuman snippet use "share recordings" --to user@example.com --vars "date=Feb 5,student_name=Jane"
# Send immediately using a snippet
superhuman snippet use "share recordings" --to user@example.com --vars "date=Feb 5" --send# List all labels
superhuman label list
# Get labels on a thread
superhuman label get <thread-id>
# Add/remove labels
superhuman label add <thread-id> --label Label_123
superhuman label remove <thread-id> --label Label_123# List attachments in a thread
superhuman attachment list <thread-id>
# Download all attachments from a thread
superhuman attachment download <thread-id>
superhuman attachment download <thread-id> --output ./downloads
# Download specific attachment
superhuman attachment download --attachment <attachment-id> --message <message-id> --output ./file.pdf# List events
superhuman calendar list
superhuman calendar list --date tomorrow --range 7 --json
# Create event
superhuman calendar create --title "Meeting" --start "2pm" --duration 30
superhuman calendar create --title "All Day" --date 2026-02-05
# Update/delete event
superhuman calendar update --event <event-id> --title "New Title"
superhuman calendar delete --event <event-id>
# Check availability
superhuman calendar free
superhuman calendar free --date tomorrow --range 7| Option | Description |
|---|---|
--account <email> |
Account to operate on (default: current account) |
--to <email|name> |
Recipient email or name (names auto-resolved via contacts) |
--cc <email|name> |
CC recipient (can be used multiple times) |
--bcc <email|name> |
BCC recipient (can be used multiple times) |
--subject <text> |
Email subject |
--body <text> |
Email body (plain text, converted to HTML) |
--html <text> |
Email body as raw HTML |
--send |
Send immediately instead of saving draft (for reply/reply-all/forward/snippet) |
--vars <pairs> |
Template variable substitution: "key1=val1,key2=val2" (for snippet use) |
--draft <id> |
Draft ID to send (for send command) |
--label <id> |
Label ID (for label add/remove) |
--until <time> |
Snooze until time: preset or ISO datetime |
--output <path> |
Output path for downloads |
--attachment <id> |
Specific attachment ID |
--message <id> |
Message ID (required with --attachment) |
--limit <number> |
Number of results (default: 10) |
--include-done |
Search all emails including archived (for search) |
--context <number> |
Number of messages to show full body (default: all, for read) |
--date <date> |
Date for calendar (YYYY-MM-DD or "today", "tomorrow") |
--range <days> |
Days to show for calendar (default: 1) |
--start <time> |
Event start time (ISO datetime or natural: "2pm", "tomorrow 3pm") |
--end <time> |
Event end time (ISO datetime) |
--duration <mins> |
Event duration in minutes (default: 30) |
--title <text> |
Event title (for calendar create/update) |
--event <id> |
Event ID (for calendar update/delete) |
--calendar <name> |
Calendar name or ID (default: primary) |
--json |
Output as JSON |
--port <number> |
CDP port (default: 9333) |
Run as an MCP server for Claude integration:
bun src/index.ts --mcp| Tool | Description |
|---|---|
superhuman_inbox |
List recent emails from inbox |
superhuman_search |
Search emails |
superhuman_read |
Read a thread |
superhuman_draft |
Create an email draft |
superhuman_send |
Send an email |
superhuman_reply |
Reply to a thread |
superhuman_reply_all |
Reply-all to a thread |
superhuman_forward |
Forward a thread |
superhuman_archive |
Archive thread(s) |
superhuman_delete |
Delete thread(s) |
superhuman_mark_read |
Mark thread(s) as read |
superhuman_mark_unread |
Mark thread(s) as unread |
superhuman_labels |
List all labels |
superhuman_get_labels |
Get labels on a thread |
superhuman_add_label |
Add label to thread(s) |
superhuman_remove_label |
Remove label from thread(s) |
superhuman_star |
Star thread(s) |
superhuman_unstar |
Unstar thread(s) |
superhuman_starred |
List starred threads |
superhuman_snooze |
Snooze thread(s) |
superhuman_unsnooze |
Unsnooze thread(s) |
superhuman_snoozed |
List snoozed threads |
superhuman_attachments |
List attachments in a thread |
superhuman_download_attachment |
Download an attachment |
superhuman_snippets |
List all snippets |
superhuman_snippet |
Use a snippet to compose or send |
superhuman_accounts |
List linked accounts |
superhuman_switch_account |
Switch to a different account |
superhuman_calendar_list |
List calendar events |
superhuman_calendar_create |
Create calendar event |
superhuman_calendar_update |
Update calendar event |
superhuman_calendar_delete |
Delete calendar event |
superhuman_calendar_free_busy |
Check free/busy availability |
superhuman_ask_ai |
Ask AI to search emails, answer questions, or compose |
Add to ~/Library/Application Support/Claude/claude_desktop_config.json:
{
"mcpServers": {
"superhuman": {
"command": "bun",
"args": ["/path/to/superhuman-cli/src/index.ts", "--mcp"]
}
}
}Most operations use direct Gmail API and Microsoft Graph API calls with cached OAuth tokens:
| Operation | Gmail API | MS Graph API |
|---|---|---|
| List inbox | GET /messages?q=label:INBOX |
GET /mailFolders/Inbox/messages |
| Search | GET /messages?q=... |
GET /messages?$search=... |
| Labels | POST /threads/{id}/modify |
PATCH /messages/{id} |
| Read status | Add/remove UNREAD label | PATCH /messages/{id} with isRead |
| Archive | Remove INBOX label | POST /messages/{id}/move |
| Star | Add STARRED label | PATCH /messages/{id} with flag |
| Attachments | GET /messages/{id}/attachments/{id} |
GET /messages/{id}/attachments/{id} |
| Contacts | Google People API | MS Graph People API |
| Calendar events | Google Calendar API | MS Graph Calendar API |
| Free/busy | POST /freeBusy |
POST /me/calendar/getSchedule |
| Snippets | Superhuman backend API | Superhuman backend API |
OAuth tokens (including refresh tokens) are extracted from Superhuman and cached to disk. When tokens expire, they are automatically refreshed via OAuth endpoints without requiring CDP connection.
Chrome DevTools Protocol is only needed for:
account auth— One-time token extraction fromwindow.GoogleAccount(also stores AI user prefix)status— Check Superhuman connectioncompose— Open Superhuman's compose UIsearch/inbox(when no cached tokens) — Fallback via Superhuman's portal API
All other operations (read, reply, forward, draft, archive, delete, labels, star, snooze, attachments, calendar, contacts, snippets) use direct API with cached tokens.
- Reliability: Direct API calls don't depend on Superhuman's UI state
- Speed: No CDP round-trips for most operations
- Offline from CDP: After initial
account auth, most operations work without CDP - Multi-account: Cached tokens enable operating on any linked account
Supports both Gmail and Microsoft/Outlook accounts.
MIT